#pragma once

#include <memory>
#include <functional>
#include "fields.hpp"

namespace rpc
{
    /*
        抽象消息类型
    */
    class BaseMessage
    {
    private:
        MType _mtype;
        std::string _rid;

    public:
        using ptr = std::shared_ptr<BaseMessage>;
        virtual ~BaseMessage() {}
        virtual void setId(const std::string &id) { _rid = id; }
        virtual std::string rid() { return _rid; }
        virtual void setMType(MType type) { _mtype = type; }
        virtual MType mtype() { return _mtype; }
        virtual std::string serialize() = 0;
        virtual bool unserialize(const std::string &msg) = 0;
        virtual bool check() = 0;
    };

    /*
        抽象缓冲区类型
    */
    class BaseBuffer
    {
    public:
        using ptr = std::shared_ptr<BaseBuffer>;
        virtual size_t readableSize() = 0;
        virtual int32_t peekInt32() = 0;
        virtual void retrieveInt32() = 0;
        virtual int32_t readInt32() = 0;
        virtual std::string retrieveAsString(size_t len) = 0;
    };

    /*
        抽象协议类型
    */
    class BaseProtocol
    {
    public:
        using ptr = std::shared_ptr<BaseProtocol>;
        virtual bool canProcessed(const BaseBuffer::ptr &buf) = 0;
        virtual bool onMessage(const BaseBuffer::ptr &buf, BaseMessage::ptr &msg) = 0;
        virtual std::string serialize(const BaseMessage::ptr &msg) = 0;
    };

    /*
        抽象连接类型
    */
    class BaseConnection
    {
    public:
        using ptr = std::shared_ptr<BaseConnection>;
        virtual void send(const BaseMessage::ptr &msg) = 0;
        virtual void shutdown() = 0;
        virtual bool connected() = 0;
    };

    using ConnectionCallback = std::function<void(const BaseConnection::ptr &)>;
    using CloseCallback = std::function<void(const BaseConnection::ptr &)>;
    using MessageCallback = std::function<void(const BaseConnection::ptr &, BaseMessage::ptr &)>;

    /*
        抽象服务类型
    */
    class BaseServer
    {
    protected:
        ConnectionCallback _cb_connection;
        CloseCallback _cb_close;
        MessageCallback _cb_message;

    public:
        using ptr = std::shared_ptr<BaseServer>;
        virtual void setConnectionCallback(const ConnectionCallback &cb)
        {
            _cb_connection = cb;
        }
        virtual void setCloseCallback(const CloseCallback &cb)
        {
            _cb_close = cb;
        }
        virtual void setMessageCallback(const MessageCallback &cb)
        {
            _cb_message = cb;
        }
        virtual void start() = 0;
    };

    /*
        抽象客户端类型
    */
    class BaseClient
    {
    protected:
        ConnectionCallback _cb_connection;
        CloseCallback _cb_close;
        MessageCallback _cb_message;

    public:
        using ptr = std::shared_ptr<BaseClient>;
        virtual void setConnectionCallback(const ConnectionCallback &cb)
        {
            _cb_connection = cb;
        }
        virtual void setCloseCallback(const CloseCallback &cb)
        {
            _cb_close = cb;
        }
        virtual void setMessageCallback(const MessageCallback &cb)
        {
            _cb_message = cb;
        }

        //建立连接
        virtual void connect() = 0;
        //关闭连接
        virtual void shutdown() = 0;
        //发送消息
        virtual bool send(const BaseMessage::ptr &) = 0;
        //返回连接
        virtual BaseConnection::ptr connection() = 0;
        //获取连接状态
        virtual bool connected() = 0;
    };

} // namespace rpc